(19)

(11)

EP 0 235 161 A1

(12)

(43) Date of publication: 09.09.1987 Bulletin 1987/37 (21) Application number: 86902616.0 (22) Date of filing: 01.04.1986

(51) International Patent Classification (IPC):  A61F 5/ 058( . ) A61B 19/ 00( . ) (86) International application number: PCT/US1986/000634 (87) International publication number: WO 1986/005680 (09.10.1986 Gazette 1986/22)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI (30) Priority: 02.04.1985 US 19850719071 (71) Applicant: BOARD OF REGENTS THE UNIVERSITY OF TEXAS SYSTEM Austin, Texas 78701 (US)	(72) Inventors: VIEGAS, Steven, F. Galveston, TX 77551 (US) TENCER, Allan, F. Galveston, TX 77550 (US) WOODARD, Peggy, L. League City, TX 77573 (US) GAYNOR, Sue, J. Kemah, TX 77565 (US)